Regioselective synthesis of syn disubstituted dibenzo-30-crown-10 ethers
作者:Piotr Piątek、Aleksandra Litwin
DOI:10.1016/j.tet.2009.01.039
日期:2009.3
A practical and regioselective synthetic method for the synthesis of syn substituted dibenzo-30-crown-10 ethers is reported. This novel methodology is reported with the syntheses of dibenzo crown ethers bearing nitro, formyl and carbomethoxy groups. The synthesis of macrocyclization precursors was accomplished in three steps and featured an application of para-methoxybenzyl group (PMB) as protecting